Optically active 2,3-epoxides, e.g., I, of a variety of substituted 1,4-naphthoquinones were prepd. in an asym. synthesis. Enantiomeric excesses of up to 45% were realized. Some data could be obtained concerning the influence of substituents on the enantiomeric excess. Furthermore, the abs. configurations could be deduced from the CD spectra.